Bibliography
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Found 12 entries in the Bibliography.
Showing entries from 1 through 12
2019 |
Review of the accomplishments of mid-latitude Super Dual Auroral Radar Network (SuperDARN) HF radars The Super Dual Auroral Radar Network (SuperDARN) is a network of high-frequency (HF) radars located in the high- and mid-latitude regions of both hemispheres that is operated under international cooperation. The network was originally designed for monitoring the dynamics of the ionosphere and upper atmosphere in the high-latitude regions. However, over the last approximately 15 years, SuperDARN has expanded into the mid-latitude regions. With radar coverage that now extends continuously from auroral to sub-auroral and mid-latitudes, a wide variety of new scientific findings have been obtained. In this paper, the background of mid-latitude SuperDARN is presented at first. Then, the accomplishments made with mid-latitude SuperDARN radars are reviewed in five specified scientific and technical areas: convection, ionospheric irregularities, HF propagation analysis, ion-neutral interactions, and magnetohydrodynamic (MHD) waves. Finally, the present status of mid-latitude SuperDARN is updated and directions for future research are discussed. Nishitani, Nozomu; Ruohoniemi, John; Lester, Mark; Baker, Joseph; Koustov, Alexandre; Shepherd, Simon; Chisham, Gareth; Hori, Tomoaki; Thomas, Evan; Makarevich, Roman; , others; Published by: Progress in Earth and Planetary Science Published on: YEAR: 2019   DOI: 10.1186/s40645-019-0270-5 |
2018 |
Lyons, LR; Gallardo-Lacourt, B; Zou, Y; Nishimura, Y; Anderson, P; , Angelopoulos; Donovan, EF; Ruohoniemi, JM; Mitchell, E; Paxton, LJ; , others; Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on: |
2017 |
Driving of Dramatic Geomagnetic Activity by Enhancement of Meso-Scale Polar-cap Flows Lyons, Larry; Gallardo-Lacourt, Bea; Zou, Ying; Nishimura, Yukitoshi; Anderson, Phillip; Angelopoulos, VASSILIS; Ruohoniemi, Michael; Mitchell, Elizabeth; Paxton, Larry; Nishitani, Nozomu; Published by: Published on: |
2015 |
GPS phase scintillation at high latitudes during two geomagnetic storms Prikryl, Paul; Ghoddousi-Fard, Reza; Ruohoniemi, John; Thomas, Evan; Zhang, Y; Paxton, LJ; Published by: Auroral dynamics and space weather Published on: |
2014 |
This paper investigates unusually deep and sudden electron density depletions (troughs) observed in the Poker Flat (Alaska) Incoherent Scatter Radar data in middle summer of 2007 and 2008. The troughs were observed in the premidnight sector during periods of weak magnetic and solar activity. The density recovered to normal levels around midnight. At the time when the electron density was undergoing its steep decrease, there was usually a surge of the order of 100 to 400 K in the ion temperature that lasted less than 1 h. The Ti surges were usually related to similar surges in the AE index, indicating that the high-latitude convection pattern was expanding and intensifying at the time of the steep electron density drop. The convection patterns from the Super Dual Auroral Radar Network also indicate that the density troughs were associated with the expansion of the convection pattern to Poker Flat. The sudden decreases in the electron density are difficult to explain in summer because the high-latitude region remains sunlit for most of the day. This paper suggests that the summer density troughs result from lower latitude plasma that had initially been corotating in darkness for several hours post sunset and brought back toward the sunlit side as the convection pattern expanded. The magnetic declination of ~22\textdegree east at 300 km at Poker Flat greatly facilitates the contrast between the plasma convecting from lower latitudes and the plasma that follows the high-latitude convection pattern. Richards, P.; Nicolls, M.; St.-Maurice, J.-P.; Goodwin, L.; Ruohoniemi, J.; Published by: Journal of Geophysical Research: Space Physics Published on: 12/2014 YEAR: 2014   DOI: 10.1002/jgra.v119.1210.1002/2014JA020541 |
2012 |
Reversed two-cell convection in the northern and southern hemisphere during northward IMF Lu, G; Li, W; Raeder, J; Deng, Y; Rich, F; Ober, D; Zhang, Y; Paxton, L; Ruohoniemi, M; Hairston, M; , others; Published by: Published on: |
2011 |
Lu, G.; Li, W.; Raeder, J.; Deng, Y.; Rich, F.; Ober, D.; Zhang, Y.; Paxton, L.; Ruohoniemi, J.; Hairston, M.; Newell, P.; Published by: Journal of Geophysical Research Published on: Jan-01-2011 YEAR: 2011   DOI: 10.1029/2011JA017043 |
2007 |
Observations of ionospheric convection from the Wallops SuperDARN radar at middle latitudes Baker, J.; Greenwald, R.; Ruohoniemi, J.; Oksavik, K.; Gjerloev, J.; Paxton, L.; Hairston, M.; Published by: Journal of Geophysical Research Published on: Jan-01-2007 YEAR: 2007   DOI: 10.1029/2006JA011982 |
Inter-annual and long-term variations observed in the ITM system Talaat, ER; Yee, J; Ruohoniemi, JM; Zhu, X; DeMajistre, R; Russell, J; Mlynczak, M; Paxton, L; Christensen, A; Published by: Published on: |
2006 |
Oksavik, K.; Greenwald, R.; Ruohoniemi, J.; Hairston, M.; Paxton, L.; Baker, J.; Gjerloev, J.; Barnes, R.; Published by: Geophysical Research Letters Published on: Jan-01-2006 YEAR: 2006   DOI: 10.1029/2006GL026256 |
Storm-time penetration electric fields and their effects Huang, Chaosong; Sazykin, Islav; Spiro, Robert; Goldstein, Jerry; Crowley, Geoff; Ruohoniemi, Michael; Published by: Published on: |
2005 |
Baker, JB; Greenwald, RA; Paxton, LJ; Zhang, Y; Ruohoniemi, JM; Oksavik, K; Published by: Published on: |
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